font3d_blender_addon/__init__.py

# SPDX-License-Identifier: GPL-2.0-only

"""
A 3D font helper
"""

bl_info = {
    "name": "Font3D",
    "author": "Jakob Schlötter, Studio Pointer*",
    "version": (0, 0, 1),
    "blender": (4, 1, 0),
    "location": "wherever it may be",
    "description": "Does Font3D stuff",
    "category": "Typography",
}

# make sure that modules are reloadable
# when registering
# handy for development
# first import dependencies for the method
import importlib

# then import dependencies for our addon
if "bpy" in locals():
    importlib.reload(Font)
    importlib.reload(utils)
    importlib.reload(butils)
else:
    from .common import Font
    from .common import utils
    from . import butils

import bpy
import queue
import math
import mathutils
import io
import functools
from bpy.types import Panel
from bpy.app.handlers import persistent
from random import uniform

import time
import datetime

import os
import re


class SharedVariables():
    fonts = Font.fonts

    def __init__(self, **kv):
        self.__dict__.update(kv)

def getPreferences(context):
    preferences = context.preferences
    return preferences.addons[__name__].preferences

shared = SharedVariables()

class FONT3D_addonPreferences(bpy.types.AddonPreferences):
    """Font3D Addon Preferences

    These are the preferences at Edit/Preferences/Add-ons"""

    bl_idname = __name__

    def get_default_assets_dir():
        return bpy.utils.user_resource(
                'DATAFILES',
                path=f"{__name__}",
                create=True)

    def on_change_assets_dir(self, context):
        if not os.path.isdir(self.assets_dir):
           butils.ShowMessageBox(
                   title=f"{__name__} Warning",
                   icon="ERROR",
                   message=("Chosen directory does not exist.",
                            "Please, reset to default, create it or chose another one."))
        elif not os.access(self.assets_dir, os.W_OK):
           butils.ShowMessageBox(
                   title=f"{__name__} Warning",
                   icon="ERROR",
                   message=("Chosen directory is not writable.",
                            "Please reset to default or chose another one."))
        else:
            shared.paths["assets"] = self.assets_dir

        print(f"{__name__}: change assets_dir to {self.assets_dir}")

    assets_dir: bpy.props.StringProperty(
            name="Assets Folder",
            subtype='DIR_PATH',
            default=get_default_assets_dir(),
            update=on_change_assets_dir,
            )

    def draw(self, context):
        layout = self.layout
        layout.label(text="Directory for storage of fonts and other assets:")
        layout.prop(self, "assets_dir")


class FONT3D_OT_Font3D(bpy.types.Operator):
    """Font 3D"""
    bl_idname = "font3d.font3d"
    bl_label = "Font 3D"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        global shared

        print("Font3d execute()")

        scene = bpy.context.scene

        file_dir = scene.font3d.file_dir
        print(f"file_dir: {file_dir}")

        return {'FINISHED'}


class FONT3D_settings(bpy.types.PropertyGroup):
    font_path: bpy.props.StringProperty(
            name="Font path",
            description="Where is the font",
            default="",
            maxlen=1024,
            subtype="FILE_PATH")
    import_infix: bpy.props.StringProperty(
            name="Font name import infix",
            description="The infix which all font objects to import have",
            default="_NM_",
            maxlen=1024,
            )
    test_text: bpy.props.StringProperty(
            name="Test Text",
            description="the text to test with",
            default="HELLO",
            maxlen=1024,
            )
    the_mother_of_typography: bpy.props.PointerProperty(
            name="The Mother Of Typography",
            description="The target, which will be populated by character children of text.",
            type=bpy.types.Object,
            )
    letter_spacing: bpy.props.FloatProperty(
            name="Letter Spacing",
            description="Letter Spacing",
            default=0.0,
            options={'ANIMATABLE'},
            )

class FONT3D_available_font(bpy.types.PropertyGroup):
    font_name: bpy.props.StringProperty(name="")

class FONT3D_glyph_properties(bpy.types.PropertyGroup):
    glyph_id: bpy.props.StringProperty(maxlen=1)
    glyph_object: bpy.props.PointerProperty(type=bpy.types.Object)
    letter_spacing: bpy.props.FloatProperty(
            name="Letter Spacing",
            description="Letter Spacing",
            )

class FONT3D_text_properties(bpy.types.PropertyGroup):
    def update_callback(self, context):
        butils.set_text_on_curve(self)
    # TODO: update when animate
    # does not work like this, somehow it does not run in main thread when the text is actually being set
    # def get_float(self):
        # return self["letter_spacingor"]
    # def set_float(self, value):
        # print(f"{utils.get_timestamp()} setting float to {value}")
        # self["letter_spacingor"] = value
        # def fun(text_properties : FONT3D_text_properties):
            # # print(text_properties)
            # # print(type(text_properties))
            # # print(text_properties.letter_spacing)
            # print(f"is running ---------------------------------->>>>>>> {text_properties.letter_spacing} and {text_properties.get('letter_spacingor')}")
            # # butils.set_text_on_curve(text_properties)
        # run_in_main_thread(lambda: fun(self))
    text_id: bpy.props.IntProperty()
    font_name: bpy.props.StringProperty()
    font_face: bpy.props.StringProperty()
    text_object: bpy.props.PointerProperty(type=bpy.types.Object)
    text: bpy.props.StringProperty(
            update=update_callback
            )
    letter_spacing: bpy.props.FloatProperty(
            # get=get_float,
            # set=set_float,
            update=update_callback,
            name="Letter Spacing",
            description="Letter Spacing",
            step=0.01,
            )
    distribution_type: bpy.props.StringProperty()
    glyphs: bpy.props.CollectionProperty(type=FONT3D_glyph_properties)

#TODO: simply, merge, cut cut cut
class FONT3D_data(bpy.types.PropertyGroup):
    available_fonts: bpy.props.CollectionProperty(type=FONT3D_available_font, name="name of the collection property")
    active_font_index: bpy.props.IntProperty()
    available_texts: bpy.props.CollectionProperty(type=FONT3D_text_properties, name="")
    active_text_index: bpy.props.IntProperty()

class FONT3D_UL_fonts(bpy.types.UIList):
    def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index):
        split = layout.split(factor=0.3)
        split.label(text="Index: %d" % (index))
        # custom_icon = "OUTLINER_OB_%s" % item.obj_type
        # split.prop(item, "name", text="", emboss=False, translate=False)
        split.label(text=f"{item.font_name}") # avoids renaming the item by accident

    def invoke(self, context, event):
        pass

class FONT3D_UL_texts(bpy.types.UIList):
    def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index):
        split = layout.split(factor=0.3)
        split.label(text="Id: %d" % (item.text_id))
        # custom_icon = "OUTLINER_OB_%s" % item.obj_type
        # split.prop(item, "name", text="", emboss=False, translate=False)
        split.label(text=f"{item.text}") # avoids renaming the item by accident

    def invoke(self, context, event):
        pass

# TODO: TODO: TODO: TODO: TODO # >>>>>>>>>>>>>>>>
execution_queue = queue.Queue()


# This function can safely be called in another thread.
# The function will be executed when the timer runs the next time.
def run_in_main_thread(function):
    execution_queue.put(function)


def execute_queued_functions():
    while not execution_queue.empty():
        function = execution_queue.get()
        function()
    return 1.0

# <<<<<<<<<<<<<<<<< TODO: TODO: TODO: TODO: TODO #

class FONT3D_PT_panel(bpy.types.Panel):
    bl_label = "Panel for Font3D"
    bl_category = "Font3D"
    bl_space_type = "VIEW_3D"
    bl_region_type = "UI"

    @classmethod
    def poll(self, context):
        scene = context.scene
        font3d = scene.font3d
        font3d_data = scene.font3d_data
        # TODO: properly include this
        def update():
            font3d_data.active_text_index = -1
            remove_list = []
            for i, t in enumerate(font3d_data.available_texts):
                if type(t.text_object) == type(None):
                    remove_list.append(i)
                    continue
                remove_me = True
                for c in t.text_object.children:
                    if len(c.users_collection) > 0 and (c.get('linked_textobject')) != type(None) and c.get('linked_textobject') == t.text_id:
                        remove_me = False
                        # not sure how to solve this reliably atm,
                        # we need to reassign the glyph, but also get the proper properties from glyph_properties
                        # these might be there in t.glyphs, but linked to removed objects
                        # or they might be lost
                        if type(next((g for g in t.glyphs if type(g.glyph_object) == type(None)), None)) == type(None):
                            g = next((g for g in t.glyphs if type(g.glyph_object) == type(None)), None)
                        for g in t.glyphs:
                            if type(g) == type(None):
                                print("IS NONE")
                            if type(g.glyph_object) == type(None):
                                print("go IS NONE")
                            else:
                                if g.glyph_object == c:
                                    # print(g.glyph_object.name)
                                    pass

                if remove_me:
                    remove_list.append(i)

            for i in remove_list:
                font3d_data.available_texts.remove(i)

            for i, t in enumerate(font3d_data.available_texts):
                if context.active_object == t.text_object:
                    font3d_data.active_text_index = i
                if (hasattr(context.active_object, "parent") and
                        context.active_object.parent == t.text_object):
                    font3d_data.active_text_index = i

        run_in_main_thread(update)

        return True

    def draw(self, context):
        global shared
        layout = self.layout
        wm = context.window_manager
        scene = context.scene

        font3d = scene.font3d
        font3d_data = scene.font3d_data

        layout.label(text="Load FontFile:")
        layout.row().prop(font3d, "font_path")
        layout.row().operator('font3d.loadfont', text='Load Font')
        layout.label(text="Available Fonts")
        layout.template_list("FONT3D_UL_fonts", "", font3d_data, "available_fonts", font3d_data, "active_font_index")
        layout.label(text='DEBUG')
        layout.row().prop(font3d, "test_text")
        layout.row().prop(font3d, "the_mother_of_typography")
        layout.row().operator('font3d.testfont', text='Distribute')
        layout.label(text="Text Objects")
        layout.template_list("FONT3D_UL_texts", "", font3d_data, "available_texts", font3d_data, "active_text_index")
        layout.label(text="font properties")
        layout.row().prop(font3d, "letter_spacing")
        layout.label(text="font creation")
        layout.row().prop(font3d, "import_infix")
        layout.row().operator('font3d.create_font_from_objects', text='Create Font')
        layout.row().separator()
        layout.row().operator('font3d.save_font_to_file', text='Save Font To File')
        layout.row().operator('font3d.toggle_font3d_collection', text='Toggle Collection')
        layout.row().operator('font3d.temporaryhelper', text='Temporary Helper')
        layout.label(text='DEBUG END')

class FONT3D_PT_TextPropertiesPanel(bpy.types.Panel):
    bl_label = "Text Properties"
    bl_parent_id = "FONT3D_PT_panel"
    bl_category = "Font3D"
    bl_space_type = "VIEW_3D"
    bl_region_type = "UI"

    def get_active_text_properties(self):
        if type(bpy.context.object) != type(None) and bpy.context.object.select_get():
            for t in bpy.context.scene.font3d_data.available_texts:
                if bpy.context.object == t.text_object:
                    return t
                if bpy.context.object.parent == t.text_object:
                    return t
        return None

    @classmethod
    def poll(self,context):
        return type(self.get_active_text_properties(self)) != type(None)

    def draw(self, context):
        global shared
        layout = self.layout
        wm = context.window_manager
        scene = context.scene
        font3d = scene.font3d
        font3d_data = scene.font3d_data

        props = self.get_active_text_properties()

        if type(props) == type(None) or type(props.text_object) == type(None):
            # this should not happen
            print("debug: this should not happen")
            layout.label(text="AAAAH")
            return
        
        layout.label(text=f"Mom: {props.text_object.name}")
        layout.row().prop(props, "letter_spacing")

class FONT3D_OT_LoadFont(bpy.types.Operator):
    """Load Font 3D"""
    bl_idname = "font3d.loadfont"
    bl_label = "Load Font"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        global shared
        scene = bpy.context.scene

        # print(f"loading da font at path {scene.font3d.font_path}")
        if not os.path.exists(scene.font3d.font_path):
            butils.ShowMessageBox(
                title=f"{__name__} Warning",
                icon="ERROR",
                message=f"We believe the font path ({scene.font3d.font_path}) does not exist.",
                )
            return {'CANCELLED'}

        currentObjects = []
        for ob in bpy.data.objects:
            currentObjects.append(ob.name)
        bpy.ops.import_scene.gltf(filepath=scene.font3d.font_path)

        newObjects = []

        fontcollection = bpy.data.collections.new("Font3D")
        scene.collection.children.link(fontcollection)

        font = {
            "name": "",
            "glyphs": []
        }

        for o in bpy.data.objects:
            if o.name not in currentObjects:
                if (o.parent == None):
                    font['name'] = o.name
                elif o.parent.name.startswith("glyphs"):
                    font['glyphs'].append(o)
                newObjects.append(o.name)
                scene.collection.objects.unlink(o)
                fontcollection.objects.link(o)

        try:
            shared.fonts
        except:
            shared.fonts = {}
        shared.fonts[font['name']] = Font.Font()
        shared.fonts[font['name']]['faces']['regular'] = font

        return {'FINISHED'}

class FONT3D_OT_TemporaryHelper(bpy.types.Operator):
    """Temp Font 3D"""
    bl_idname = "font3d.temporaryhelper"
    bl_label = "Temp Font"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        global shared
        scene = bpy.context.scene
        font3d_data = scene.font3d_data

        font3d_data.available_texts.clear()

        return {'FINISHED'}

class FONT3D_OT_TestFont(bpy.types.Operator):
    """Test Font 3D"""
    bl_idname = "font3d.testfont"
    bl_label = "Test Font"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        global shared
        scene = bpy.context.scene

        selected = bpy.context.view_layer.objects.active

        font3d = scene.font3d
        font3d_data = scene.font3d_data

        if font3d.the_mother_of_typography:
            selected = font3d.the_mother_of_typography

        if selected:
            font_name = "NM_Origin"
            font_face = "Tender"

            distribution_type = 'DEFAULT'

            text_id = 0
            for i, tt in enumerate(font3d_data.available_texts):
                while text_id == tt.text_id:
                    text_id = text_id + 1
            t = font3d_data.available_texts.add()
            t.text_id = text_id

            t.font_name = font_name
            t.font_face = font_face
            t.text_object = selected
            t.text = scene.font3d.test_text
            t.letter_spacing = 0.0
            t.distribution_type = distribution_type
        else:
            butils.ShowMessageBox(
                    title="No object selected",
                    message=(
                        "Please select an object.",
                        "It will be used to put the type on.",
                        "You little piece of shit :)"),
                    icon='GHOST_ENABLED')

        return {'FINISHED'}

class FONT3D_OT_ToggleFont3DCollection(bpy.types.Operator):
    """Toggle Font3D Collection"""
    bl_idname = "font3d.toggle_font3d_collection"
    bl_label = "Toggle Collection visibility"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        scene = context.scene
        fontcollection = bpy.data.collections.get("Font3D")

        if fontcollection is None:
            self.report({'INFO'}, f"{bl_info['name']}: There is no collection")
        elif scene.collection.children.find(fontcollection.name) < 0:
            scene.collection.children.link(fontcollection)
            self.report({'INFO'}, f"{bl_info['name']}: show collection")
        else:
            scene.collection.children.unlink(fontcollection)
            self.report({'INFO'}, f"{bl_info['name']}: hide collection")

        return {'FINISHED'}


class FONT3D_OT_SaveFontToFile(bpy.types.Operator):
    """Save font to file"""
    bl_idname = f"{__name__}.save_font_to_file"
    bl_label = "Save Font"
    bl_options = {'REGISTER', 'UNDO'}

    file_path =  "whoopwhoop"

    def execute(self, context):
        global shared
        scene = bpy.context.scene
        font3d_data = scene.font3d_data
        font3d = scene.font3d

        fontcollection = bpy.data.collections.get("Font3D")

        # check if all is good to proceed
        if fontcollection is None:
            self.report({'INFO'}, f"{bl_info['name']}: There is no collection")
            return {'CANCELLED'}

        if font3d_data.active_font_index < 0:
            self.report({'INFO'}, f"{bl_info['name']}: There is no active font")
            return {'CANCELLED'}

        if len(font3d_data.available_fonts) <= font3d_data.active_font_index:
            self.report({'INFO'}, f"{bl_info['name']}: Active font is not available")
            return {'CANCELLED'}

        # save state to restore later
        was_fontcollection_linked = scene.collection.children.find(fontcollection.name) >= 0
        was_selection = []
        for obj in bpy.context.selected_objects:
            was_selection.append(obj)
        was_active_object = bpy.context.view_layer.objects.active

        bpy.ops.object.select_all(action="DESELECT")

        # get save data
        selected_font = font3d_data.available_fonts[font3d_data.active_font_index]

        # print(selected_font.font_name)
        self.report({'INFO'}, f"{bl_info['name']}: {selected_font.font_name}")
        preferences = getPreferences(context)
        print(f"assets folder: {preferences.assets_dir}")

        bpy.ops.scene.new(type='FULL_COPY')

        linked_collections = bpy.context.scene.collection.children.values()
        for c in linked_collections:
            bpy.context.scene.collection.children.unlink(c)
        bpy.context.scene.collection.children.link(fontcollection)

        # select what needs to be selected
        export_objects = []
        for obj in fontcollection.objects:
            if obj["font_name"] == selected_font.font_name:
                obj.select_set(True)
                export_objects.append(obj)

        context_override = bpy.context.copy()
        context_override["selected_objects"] = list(export_objects)
        # context_override["scene"] = bpy.context.scene.copy()
        with bpy.context.temp_override(**context_override):
            filepath = f"{preferences.assets_dir}/fonts/{selected_font.font_name}.gltf"
            # get rid of scene extra data before export
            for k in bpy.context.scene.keys():
                del bpy.context.scene[k]

            # save as gltf
            bpy.ops.export_scene.gltf(
                filepath=filepath,
                check_existing=False,
                export_format='GLTF_SEPARATE',
                export_extras=True,
                # export_hierarchy_full_collections=True,
                # use_active_collection_with_nested=True,
                use_selection=True,
                use_active_scene=True,
            )
            # bpy.app.timers.register(lambda: bpy.ops.scene.delete(), first_interval=5)

            bpy.ops.scene.delete()
        # restore()

        return {'FINISHED'}
# keep = ['io_anim_bvh', 'io_curve_svg', 'io_mesh_stl', 'io_mesh_uv_layout', 'io_scene_fbx', 'io_scene_gltf2', 'io_scene_x3d', 'cycles', 'pose_library', 'font3d']
# for addon in keep:
    # bpy.ops.preferences.addon_enable(module=addon)


class FONT3D_OT_CreateFontFromObjects(bpy.types.Operator):
    """Create Font from open objects"""
    bl_idname = "font3d.create_font_from_objects"
    bl_label = "Create Font"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        global shared
        scene = bpy.context.scene
        font3d = scene.font3d
        font3d_data = scene.font3d_data

        fontcollection = bpy.data.collections.get("Font3D")

        if fontcollection is None:
            fontcollection = bpy.data.collections.new("Font3D")

        ifxsplit = font3d.import_infix.split('_')
        font_name = f"{ifxsplit[1]}_{ifxsplit[2]}"
        face_name = ifxsplit[3]

        added_font = False

        font3d_data.available_fonts.clear()
        Font.fonts = {}

        currentObjects = []
        for o in bpy.data.objects:
            if o.name not in currentObjects:
                if font3d.import_infix in o.name:
                    uc = o.users_collection
                    regex = f"{font3d.import_infix}(.)*"
                    name = re.sub(regex, "", o.name) 
                    glyph_id = "unknown"
                    if len(name) == 1:
                        glyph_id = name
                    elif name in Font.name_to_glyph_d:
                        glyph_id = Font.name_to_glyph_d[name]

                    if glyph_id != "unknown":
                        o["glyph"] = glyph_id
                        o["font_name"] = font_name
                        o["face_name"] = face_name
                        # butils.apply_all_transforms(o)
                        butils.move_in_fontcollection(
                                o,
                                fontcollection)
                        Font.add_glyph(
                                font_name,
                                face_name,
                                glyph_id,
                                o)
                        added_font = True

                        #TODO: is there a better way to iterate over a CollectionProperty?
                        found = False
                        for f in font3d_data.available_fonts.values():
                            if f.font_name == font_name:
                                found = True
                                break
                        if not found:
                            f = font3d_data.available_fonts.add()
                            f.font_name = font_name

                    else:
                        self.report({'INFO'}, f"did not understand glyph {name}")

        return {'FINISHED'}

class FONT3D_PT_RightPropertiesPanel(bpy.types.Panel):
    """Creates a Panel in the Object properties window"""
    bl_label = f"{__name__}"
    bl_idname = "FONT3D_PT_RightPropertiesPanel"
    bl_space_type = 'PROPERTIES'
    bl_region_type = 'WINDOW'
    bl_context = "object"

    @classmethod
    def poll(self,context):
        # only show the panel, if it's a textobject or a glyph
        is_text = type(next((t for t in context.scene.font3d_data.available_texts if t.text_object == context.active_object), None)) != type(None)
        is_glyph = type(next((t for t in context.scene.font3d_data.available_texts if t.text_object == context.active_object.parent), None)) != type(None)
        return is_text or is_glyph

    def draw(self, context):
        layout = self.layout
        scene = context.scene
        font3d = scene.font3d
        font3d_data = scene.font3d_data

        obj = context.active_object

        def is_text():
            return type(next((t for t in context.scene.font3d_data.available_texts if t.text_object == context.active_object), None)) != type(None)
        def is_glyph():
            return type(next((t for t in context.scene.font3d_data.available_texts if t.text_object == context.active_object.parent), None)) != type(None)

        textobject = obj if is_text() else obj.parent if is_glyph() else obj
        available_text = font3d_data.available_texts[font3d_data.active_text_index]

        row = layout.row()
        row.label(text="Hello world!", icon='WORLD_DATA')

        row = layout.row()
        row.label(text="Active object is: " + obj.name)
        row = layout.row()
        row.label(text="text object is: " + textobject.name)
        row = layout.row()
        row.label(text=f"active text index is: {font3d_data.active_text_index}")
        row = layout.row()
        row.prop(available_text, "text")
        row = layout.row()
        row.prop(available_text, "letter_spacing")



classes = (
            FONT3D_addonPreferences,
            FONT3D_OT_Font3D,
            FONT3D_available_font,
            FONT3D_glyph_properties,
            FONT3D_text_properties,
            FONT3D_data,
            FONT3D_settings,
            FONT3D_UL_fonts,
            FONT3D_UL_texts,
            FONT3D_PT_panel,
            FONT3D_PT_TextPropertiesPanel,
            FONT3D_OT_TemporaryHelper,
            FONT3D_OT_TestFont,
            FONT3D_OT_LoadFont,
            FONT3D_OT_ToggleFont3DCollection,
            FONT3D_OT_SaveFontToFile,
            FONT3D_OT_CreateFontFromObjects,
            FONT3D_PT_RightPropertiesPanel,
           )

@persistent
def load_handler(self, dummy):
    bpy.app.timers.register(execute_queued_functions)

def load_handler_unload():
    bpy.app.timers.unregister(execute_queued_functions)

def register():
    for cls in classes:
        bpy.utils.register_class(cls)
    bpy.types.Scene.font3d = bpy.props.PointerProperty(type=FONT3D_settings)
    bpy.types.Scene.font3d_data = bpy.props.PointerProperty(type=FONT3D_data)
    # bpy.types.Object.__del__ = lambda self: print(f"Bye {self.name}")
    print(f"REGISTER {bl_info['name']}")

    # auto start
    if load_handler not in bpy.app.handlers.load_post:
        bpy.app.handlers.load_post.append(load_handler)

    # clear available fonts
    def clear_available_fonts():
        bpy.context.scene.font3d_data.available_fonts.clear()

    def load_available_fonts():
        global shared
        preferences = getPreferences(bpy.context)

        currentObjects = []
        for ob in bpy.data.objects:
            currentObjects.append(ob.name)

        print(f"assets folder: {preferences.assets_dir}")
        font_dir = f"{preferences.assets_dir}/fonts"
        for file in os.listdir(font_dir):
            if file.endswith(".glb"):
                font_path = os.path.join(font_dir, file)
                bpy.ops.import_scene.gltf(filepath=font_path)

        fontcollection = bpy.data.collections.get("Font3D")
        if fontcollection is None:
            fontcollection = bpy.data.collections.new("Font3D")

        remove_list = []
        all_objects = []
        for o in bpy.data.objects:
            all_objects.append(o)
        for o in all_objects:
            if o.name not in currentObjects:
                # must be new
                if ("glyph" in o.keys()
                        and "face_name" in o.keys()
                        and "font_name" in o.keys()):
                    glyph_id = o["glyph"]
                    font_name = o["font_name"]
                    face_name = o["face_name"]
                    butils.move_in_fontcollection(
                            o,
                            fontcollection)
                    Font.add_glyph(
                            font_name,
                            face_name,
                            glyph_id,
                            o)

                    font3d_data = bpy.context.scene.font3d_data
                    found = False
                    for f in font3d_data.available_fonts.values():
                        if f.font_name == font_name:
                            found = True
                            break
                    if not found:
                        f = font3d_data.available_fonts.add()
                        f.font_name = font_name
                        print(f"font3d added {font_name}")
                else:
                    remove_list.append(o)
        for o in remove_list:
            bpy.data.objects.remove(o, do_unlink=True)

    run_in_main_thread(clear_available_fonts)
    run_in_main_thread(load_available_fonts)

def unregister():
    for cls in classes:
        bpy.utils.unregister_class(cls)

    if load_handler in bpy.app.handlers.load_post:
        bpy.app.handlers.load_post.remove(load_handler)
    load_handler_unload()

    del bpy.types.Scene.font3d
    del bpy.types.Scene.font3d_data
    print(f"UNREGISTER {bl_info['name']}")

if __name__ == '__main__':
    register()